|
|
Journal of Ultrafine Grained and Nanostructured Materials، جلد ۵۴، شماره ۱، صفحات ۴۰-۵۰
|
|
|
| عنوان فارسی |
|
|
| چکیده فارسی مقاله |
|
|
| کلیدواژه‌های فارسی مقاله |
|
|
| عنوان انگلیسی |
Study on supercapacitance performance of TiO2 nanotube arrays modified by non-metal doping and Polyaniline electrodeposition methods |
|
| چکیده انگلیسی مقاله |
Highly ordered TiO2 nanotube arrays were synthesized by a two-step anodizing method. Although TiO2 nanotubes have excellent electrical and capacitive properties because they provide a unidirectional path for electron transfer. But these properties can be improved by effective methods such as non-metallic doping or by a conductive polymer. For this purpose, nitrogen and hydrogen doping methods and electrical deposition of polyaniline were used simultaneously to prepare the polyaniline-TiO2, polyaniline/N-TiO2, and polyaniline/H-TiO2 nanotube arrays samples. To evaluate the electrochemical and capacitive properties in more detail, cyclic voltammetry, electrochemical impedance spectroscopy, Matt-Schottky, and galvanostatic charge-discharge tests were performed. The results showed that the composite of TiO2 doped with hydrogen and deposited with polyaniline nanowires had the highest capacitance (5666 µF.Cm-2) at the current density of 100 µA/cm2, approximately 4.5 times more than polyaniline/TiO2 sample. It also has the lowest charge transfer resistance (0.008 Ωcm2) and the highest charge carrier density (1.63×1024cm-3). Increasing the density of charge carriers and decreasing the electrical resistance can be attributed to the fact that the hydrogen doping, the presence of oxygen vacancies, and conductive polymer increase the rate of separation of the charge carriers and decrease their recombination rate. Therefore, the electron transfer rate and the electric current increase. |
|
| کلیدواژه‌های انگلیسی مقاله |
TiO2 nanotube arrays, Non-metal doping, Polyaniline, EIS, Capacitive performance |
|
| نویسندگان مقاله |
Sh. Khameneh Asl |
Department of Materials Engineering, Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran
Mehri Maghsoudi |
Department of Materials Engineering, Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran
Faezeh Gorbani |
Department of Materials Engineering, Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran
|
|
| نشانی اینترنتی |
https://jufgnsm.ut.ac.ir/article_81951_7ecc0a28d1b1925496bc30602f46fbf0.pdf |
| فایل مقاله |
فایلی برای مقاله ذخیره نشده است |
| کد مقاله (doi) |
|
| زبان مقاله منتشر شده |
en |
| موضوعات مقاله منتشر شده |
|
| نوع مقاله منتشر شده |
|
|
|
|
برگشت به:
صفحه اول پایگاه |
نسخه مرتبط |
نشریه مرتبط |
فهرست نشریات
|